"Lookalike" is a relative term for sure. With just a little bit of practice one would never confuse the two. It's always best to learn side-by-side with someone who can show you what to look for.
A good rule is this: If you have to double-check with a book (or an app or whatever) to identify the mushroom, you do NOT know it well enough to risk eating it.
Inverted sign in the window should be "petit" not "petite". Ruined.